// 7.3.20 SpeciesConstructor(O, defaultConstructor) | |
var anObject = require('./_an-object'); | |
var aFunction = require('./_a-function'); | |
var SPECIES = require('./_wks')('species'); | |
module.exports = function (O, D) { | |
var C = anObject(O).constructor; | |
var S; | |
return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? D : aFunction(S); | |
}; |